Fuse



1946. A. F. TEITSCHEID 2,392,430

FUSE

Filed Feb. 12, 1942 IJnawntov Alfred F.Tatsche d Patentecl Jan. 8, 1946 UNITED STATES PATENT GFF!CE FUSE Alfred F. Teitscheid, Wharton, N. J.

Application February 12, 1942, Serial No. 430,587

(Granted under the act of March 3, 1883, as

amended April 30, 1928; 370 0. G. 757) 1 Claim.

The invention descrihed herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to projectile fuses and in particular to the type having a rotatable firng member positioned by gyration of the projectile of the type shown in French Patent 687,004 and in Brtish Patent 475,596.

The fuse embodies safety features also operating on the centrifugal principle. It is simple of constructon and lends itself to manufacture either from die castings or plastics in addition to the conventional methode of manufactures, as from bar stock.

It is therefore an object of the invention to produce a fuse which shall be safe in handlng and armed by centrifugal force in firng and comprsing a minimum number of parts.

It is a further object of the invention to produce a fuse having a centrifugally operated arming member of non-metallic material.

T these and other ends, the invention consists in the construction, arrangement and oom bination of elements described hereinafter and pointed out in the claim formng a part of this specfication.

A practical embodiment of the invention is illustrated in the accompanying drawing wherein:

Figure 1 is a view in axial section of a fuse embodying the invention, showng the safe position,

Figure 2 is a fragmental view, similar to Figure 1 and showing the fuse in armed position, and

Figure 3 is a fragmental sectional view taken on the line 3-3 of Figure 1.

Referring to the drawing by characters of reference there is shown a projectile nose piece I carrying in an axial passage 2, a firng pin 3 and a dust cap 4. Inserted in an enlarged chamber is a s1eeve 6 surrounding a hearing member 1 for the fuse rotor 8. Threadedly received in the rear of the chamber 5 is a retainer and partition 5, and a booster container I 8. The partition 9 has an ntermediate ignition component II for transmitting the detonation to the booster, and ;l2l6 partition may be equipped with spanner holes The rotor 8 is received in a slot l3 in the bearing member 1 and is rotatable about pins I4 in the hearing member. Centrifugal blocks l5 in bores |6 in the hearing memher are urged hy springs into engagement with bores 8 in the rotor 8 to maintain the rotor in safe position.

Contained in a bore in the rotor 8 is a primer capsule l9, alignable with the firng pin and ignition component II in one position of the rotor 8.

The rotor is designed to contact the rear wa1l of the slot l3 of the hearing member 7 and the partition 9 to limit rotation of the rotor 8 in the clockwise sense, and in this position, an upstanding portion 20 of the rotor 8 underlies the firng pin to restrain the rearward motion of the same, being slotted as at 2! to receive the point of the firing pin.

In the preferred form, the rotor comprises a non-metallic material, and a, heavy insert 22 is provided in order to shift the center of gravty away from the axis of rotaton of the proiectile. I-Iowever, proper location of the center of gravity may be provided for in the design of a metal rotor.

On firing the projectile, setback forces are at first predominant, acting on the center of gravity of the rotor to rotate the same in a clockwise sense, acting on the firing pn to further bind the rotor, and actng on the safety bolts to prevent their withdrawal.

After abatement of setback forces, the centrifugal forces come into play, first withdrawing the blocks I5, and then aligning the primer l9 hy tendng to bring the center of gravity of the rotor 8 into the directon of the forse, that is to say, radially of the projectile. 'I'his leaves the firing pin free and on impact it is forced into the primer.

The rotor, hearing member, sleeve and partition, any or all of them may consist of molded Bakelite or any other of the known plastics, such as form aldehyde urea, cellulose derivatives, vinyl com pounds, methacrylates, casein products or lignin. In addition to the prepared resns, naturel resins may also be employed and the broad term nonmetallic is intended to include, for example, such substances as hard anti soft rubber, wond, paper and leather, and in general any organic or 1'ibrous materal.

The use of a 1ight material for the rotor permits of the displacement of the center of gravty by means of a heavy insert without unduly increasng the size of the rotor.

The sieeve 6 not only serves as a reinforcement for the hearing member 1 but a1so permits assembly prior to inserton in the projectile.

I claim:

In a centrifugally armable fuse having a chamber, a firing pin axially mounted therein and entering said chamber, a, hearing memher in the chamber and having a slot therein, a rotor pvoted in said slot anti having a primer maintained at an angle to the axs of the firing pin when the fuse is in unarmed position, the rotor being formed with a portion engaging the sid e wa1l 01' the hearing member when in said unarmed positon to limit the rotation of the rotor in clockwise directon, and a projection en the rotor engaging the firng pin when the rotor is at the limit of its clockwise movement to lock the firing pin in unto limit the anticlockwse movement of the rotor when, by centrifugal force, the rotor is rotate;i to bring the primer in line with the firing pin, the rotor also being provided with oppositely disposed recesses below its pivotal pont, ancisp xaing;-

back b1ocks slidably mounted in the hearing member and extending into sad recesses and normally lockng the rotor against rotat0n said blocks having a substantial lower hearing surface in the recesses of the rotor and in the hearing member to augment the efiect of setback forces, said blocks fcncces; to preventthe wthdxawal; of;the blocks until after the cessation of said forces, when the I=xsa;ici blocks are withdrawn from said recesses by centrifugal forces to allow the rotor to operatively respond to centrifugal forces to arm the fuse.

TEI'TSCHEID. 

